The Application of MIMO to Non-Orthogonal Multiple Access

Ding, Zhiguo; Adachi, Fumiyuki; Poor, H. Vincent

doi:10.1109/twc.2015.2475746

Cited by 838 publications

(625 citation statements)

References 24 publications

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“…Clearly, conventional NOMA of two users can be applied in each cluster. In [8], this approach is studied to support 2N users in the same frequency and time slot with N beams that are obtained by zero-forcing (ZF) beamforming to suppress the inter-cluster interference.…”

Section: A Noma With Beamformingmentioning

confidence: 99%

Application of Non-Orthogonal Multiple Access in LTE and 5G Networks

et al. 2017

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As the latest member of the multiple access family, non-orthogonal multiple access (NOMA) has been recently proposed for 3GPP Long Term Evolution (LTE) and envisioned to be an essential component of 5th generation (5G) mobile networks. The key feature of NOMA is to serve multiple users at the same time/frequency/code, but with different power levels, which yields a significant spectral efficiency gain over conventional orthogonal MA. The article provides a systematic treatment of this newly emerging technology, from its combination with multiple-input multiple-output (MIMO) technologies, to cooperative NOMA, as well as the interplay between NOMA and cognitive radio. This article also reviews the state of the art in the standardization activities concerning the implementation of NOMA in LTE and 5G networks.

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Section: A Noma With Beamformingmentioning

confidence: 99%

Application of Non-Orthogonal Multiple Access in LTE and 5G Networks

et al. 2017

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“…In [4], the application of the NOMA in large-scale underlay cognitive radio networks with randomly deployed users was studied employing a stochastic geometry approach. NOMA was also proposed in [5], [6] for multiple-input multiple-output (MIMO) systems. Furthermore, NOMA was also extended in [7] to a cooperative scenario, where users under good channel conditions can be used as relays for other users under poor channel conditions.…”

Section: Introductionmentioning

confidence: 99%

Non‐orthogonal multiple access schemes with partial relay selection

et al. 2017

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In this paper, non-orthogonal multiple access (NOMA) in amplify-and-forward relay systems with partial relay selection (PRS) is investigated. More specifically, new exact closed-form expressions for the outage probabilities at two users are derived, based on which an asymptotic analysis at high signalto-noise ratio (SNR) is carried out. Additionally, in order to investigate the performance gap between the NOMA and orthogonal multiple access (OMA) schemes, a closed-form approximate expression at high SNR for the sum rate is derived. Furthermore, relying on our results, the impact of the PRS on the sum rate and outage probability of the proposed NOMA scheme is examined. In particular, the derived asymptotic expressions show that the proposed scheme can improve over the traditional OMA not only the sum rate but also the user fairness. Finally, simulation results are presented to corroborate the analytical results. Index TermsNon-orthogonal multiple access (NOMA), spectrum efficiency, amplify-and-forward (AF) relay, partial relay selection, outage probability, sum rate.

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“…There are also T user clusters in the proposed NOMA setup. From [36], it is known that NOMA can already support 2T users, whereas OMA only supports T users.…”

Section: Coordinated Processing (Cp)mentioning

confidence: 99%

Dynamic Fractional Frequency Reuse Diversity Design for Intercell Interference Mitigation in Nonorthogonal Multiple Access Multicellular Networks

Mehmood

Niaz

Kim

2018

Wireless Communications and Mobile Computing

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Nonorthogonal multiple access (NOMA) is one of the few promising techniques that can ensure the achievement of benefits foreseen in next-generation 5G wireless networks and beyond. By using superposition coding, NOMA allows multiple users to share the same time and frequency resources, thereby enhancing user connectivity, spectral efficiency, and a considerable increase in user throughput. Interference mitigation is an important consideration in NOMA and is considerably more influencing in multicellular environments. First, a brief description of the impairments that can arise in a NOMA cellular network along with responsible factors is provided. Second, different approaches adopted to minimize these impairments are discussed. Finally, a possible solution is proposed that consists of a coordinated approach between the individual cells in the NOMA domain to minimize interferences and improve user throughput. Adaptive fractional frequency reuse (FFR) is used to allocate distinct frequency resources to edge users of different cells to minimize intercell interference in NOMA. Simulation results prove that the proposed NOMA scheme plays an important role in minimizing impairment effects and enhancing the SINR and the throughput performance of edge users while ensuring fairness in its design.

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The Application of MIMO to Non-Orthogonal Multiple Access

Cited by 838 publications

References 24 publications

Application of Non-Orthogonal Multiple Access in LTE and 5G Networks

Application of Non-Orthogonal Multiple Access in LTE and 5G Networks

Non‐orthogonal multiple access schemes with partial relay selection

Dynamic Fractional Frequency Reuse Diversity Design for Intercell Interference Mitigation in Nonorthogonal Multiple Access Multicellular Networks

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